气水两相流喷嘴喷射条件对雾化降尘影响的实验研究  

Experimental study on influence of the spray condition to dust removal of gas-liquid two-phase flow nozzle

作　　者：袁辉 徐锐 陈本良 祝文军[3] 欧阳晓平 YUAN Hui;XU Rui;CHEN Ben-liang;ZHU Wen-jun;OU Yang-Xiao-ping(School of Materials Science and Engineering,Xiangtan University,Xiangtan 411100,China;Coal Mining National Engineering Technology Research Institute,Huainan 232001,China;State Key Laboratory of Disaster Prevention and Reduction for Power Grid Transmission and Distribution Equipment,Changsha 410000,China;Laboratory of Shock wave and Detonation Physics,Institute of Fluid Physics,Mianyang 621900,China)

机构地区：[1]湘潭大学材料科学与工程学院,湖南湘潭411100 [2]电网输变电设备防灾减灾国家重点实验室,长沙410000 [3]中国工程物理研究院-流体物理研究所冲击波物理与爆轰物理重点实验室,四川绵阳621900 [4]煤炭开采国家工程技术研究院,安徽淮南232001

出　　处：《煤炭工程》2018年第12期127-132,共6页Coal Engineering

基　　金：国家重点研发计划(2017YFC0805202);输变电设备防灾减灾国家重点实验室开放基金项目(2016ZKFW127).

摘　　要：喷嘴的雾化特性和喷雾降尘系统的设计直接影响到矿道雾化降尘的效果。文章设计加工了一种气水两相流雾化喷嘴,和一套完整的除尘系统实验平台,开展了不同喷射条件参数下的雾化特性实验和不同雾化特性的雾化降尘效果实验。研究表明,喷嘴雾滴粒径随着气压的增大而减小,随着水压的增大而增大,在一定气液比值范围内,喷嘴具有良好的雾化性能,粒径小,雾化均匀,在外流场中沿横向方向几乎不变,沿轴向方向逐渐增大;且实验发现降尘效率随着雾滴粒径和雾化量的的增大而减小,随着粉尘浓度的增大而增大,在雾滴粒径小于10μm时,对呼吸性粉尘的去除有良好的效果。为气水两相流喷嘴的使用和除尘装置的设计与布局提供了思路和关键技术支撑。Nozzle atomization characteristics and the design of dust removal device directly affects the tunnels atomization effect of the dust,a two -phase flow nozzle is designed and manufactured,and a complete set of dust removal device experimental platform. Experiments on atomization characteristics under different injection conditions and experiments on atomization dust reduction with different atomization characteristics are carried out. Studies have shown the particle diameter decreases with the increase of gas pressure,increase with the water pressure,and the nozzle has good atomization performance in a certain range of gas-liquid ration. Along the transverse direction is almost the same in the flow field,is gradually increasing along the axial direction. And the experiment found that the dust removal efficiency decreased with the increase of the particle size of the fog drop,and the removal of the respirable dust had a good effect when the particle size was less than 10 microns. The results provide theoretical basis and key technical support for the use of two-phase nozzle and the better application of mining dust removal device.

关 键 词：两相流喷嘴 雾化性能 雾化降尘 喷射条件 雾滴粒径 

分 类 号：TD403[矿业工程—矿山机电]